One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,5)(7,8)(9,10)(11,14)(12,13)(15,16)(17,18)(19,25)(20,26)(21,30)(22,24)(23,27)(28,32)(29,31) involution — undirected(2,5)(6,8)(18,24)(19,28)(20,29)(21,23)(25,31)(26,32) involution — undirected(10,13)(14,16)(17,19,22,20)(18,25,24,26)(21,28,23,29)(27,31,30,32)(9,11,12,15)(10,14,13,16)(17,20,22,19)(18,26,24,25)(21,29,23,28)(27,32,30,31)(1,3,4,7)(2,6,5,8)(17,21,22,23)(18,27,24,30)(19,28,20,29)(25,31,26,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.